HI Dar,

You right about the price to value issue.
The only reason i got one is because the awful and stupid design of the super tigre muffler.
I'm didn't bought from any power reasons and now that i'm running it i can that there is no difference and no power boost.

But, now i can fly normally and i don't need to worry to lose my muffler and my model.
The Macs muffler really light compare to the ST, now i got a better performance because the nose of my model is light.
It don't break apart like the ST and quick to assemble it.

I need to take a look on it again and to see the issue about the drilling.